US4021810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Travelling wave meander conductor antenna
Assignee: Individual
•
Filing: 1975-12-22
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Granted: 1977-05-03
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Expires: 1995-12-22
Abstract
Abstract A travelling wave conductor antenna including a ground plane. The antenna consists of meander-structure conductors made of a conductive material, zigzagging at right angles or at almost right angles. The conductors are placed above an even or deformed ground plane and they alternately comprise portions parallel with the longitudinal axis of the antenna and portions perpendicular or almost perpendicular to said longitudinal axis so that the number of the conductors is even. The conductors are at their ends connected to an antenna feed point by means of electrically equally long or almost equally long conductors.
Inventors
- 👤 Seppo I. Urpo
- 👤 Henry Stefan Tallqvist
- 👤 Martti E. Tiuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:08
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
In a travelling wave meander conductor antenna including a ground plane, the improvement comprising: meander-structure conductors made of a conductive material, said conductors zigzagging as substantially forming open parallelograms and placed above a ground plane, which conductors alternately comprise first portions parallel with the longitudinal axis of the antenna and second portions substantially perpendicular to said longitudinal axis so that the number of conductors is even, said conductors being connected at their respective ends to an antenna feed point by means of electrically substantially equally long conductors.
Claim 2
Dependent Claim
87 words
In a travelling wave meander conductor antenna including a ground plane, the improvement comprising: meander-structure conductors made of a conductive material, said conductors zigzagging as substantially forming open parallelograms and placed above a ground plane, which conductors alternately comprise first portions parallel with the longitudinal axis of the antenna and second portions substantially perpendicular to said longitudinal axis so that the number of conductors is even, said conductors being connected at their respective ends to an antenna feed point by means of electrically substantially equally long conductors.
Claim 3
Dependent Claim
29 words
A meander conductor antenna as claimed in claim 1, characterized in that the second portions of the conductors in the antenna form an oblique angle with the longitudinal direction.
Claim 4
Dependent Claim
42 words
A meander conductor antenna as claimed in claim 1, characterized in that the height from the ground plane, the width, and the insulation material of the meander conductors is dimensioned so that the current wave passes along the conductors almost without reflections.
Claim 5
Dependent Claim
23 words
A meander conductor antenna as claimed in claim 1, characterized in that the meander conductors are, made on a plate of insulating material.
Claim 6
Dependent Claim
29 words
A meander conductor antenna as claimed in claim 4, characterized in that both the meander conductors and the ground plane are made on the same plate of insulating material.
Claim 7
Dependent Claim
19 words
The meander conductor antenna as claimed in claim 1 wherein said conductors are placed above a deformed ground plane.
Claim 8
Dependent Claim
21 words
A meander conductor antenna as claimed in claim 1 wherein said meander conductors are made on a film of insulating material.
References Cited (Backward Citations)
US3377592A
Cited
US3689929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |